CN115518613A - Preparation system and method of base biochar composite material for nitrogen and phosphorus retention and heavy metal fixation - Google Patents
Preparation system and method of base biochar composite material for nitrogen and phosphorus retention and heavy metal fixation Download PDFInfo
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- CN115518613A CN115518613A CN202210223105.8A CN202210223105A CN115518613A CN 115518613 A CN115518613 A CN 115518613A CN 202210223105 A CN202210223105 A CN 202210223105A CN 115518613 A CN115518613 A CN 115518613A
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- electric telescopic
- servo motor
- telescopic rod
- composite material
- biochar composite
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- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 33
- 230000014759 maintenance of location Effects 0.000 title claims abstract description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 11
- 239000011574 phosphorus Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 20
- 238000004804 winding Methods 0.000 claims abstract description 46
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 30
- 239000004917 carbon fiber Substances 0.000 claims abstract description 30
- 238000003763 carbonization Methods 0.000 claims abstract description 12
- 230000002708 enhancing effect Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 claims description 17
- 239000012266 salt solution Substances 0.000 claims description 15
- 239000003610 charcoal Substances 0.000 claims description 14
- 238000002791 soaking Methods 0.000 claims description 14
- 239000002028 Biomass Substances 0.000 claims description 13
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 11
- 239000002585 base Substances 0.000 claims description 10
- 229910044991 metal oxide Inorganic materials 0.000 claims description 10
- 150000004706 metal oxides Chemical class 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 150000003609 titanium compounds Chemical class 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 6
- 239000011790 ferrous sulphate Substances 0.000 claims description 6
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 6
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims description 6
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 6
- 239000002127 nanobelt Substances 0.000 claims description 6
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 6
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000011592 zinc chloride Substances 0.000 claims description 6
- 235000005074 zinc chloride Nutrition 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- MCDLETWIOVSGJT-UHFFFAOYSA-N acetic acid;iron Chemical compound [Fe].CC(O)=O.CC(O)=O MCDLETWIOVSGJT-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000002829 reductive effect Effects 0.000 claims description 4
- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical group CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- 239000000908 ammonium hydroxide Substances 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 3
- 238000010000 carbonizing Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229960002089 ferrous chloride Drugs 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000010815 organic waste Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 235000011007 phosphoric acid Nutrition 0.000 claims description 3
- 235000011118 potassium hydroxide Nutrition 0.000 claims description 3
- HKJYVRJHDIPMQB-UHFFFAOYSA-N propan-1-olate;titanium(4+) Chemical compound CCCO[Ti](OCCC)(OCCC)OCCC HKJYVRJHDIPMQB-UHFFFAOYSA-N 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 238000004448 titration Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000012190 activator Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 1
- 229910000358 iron sulfate Inorganic materials 0.000 claims 1
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- PVFSDGKDKFSOTB-UHFFFAOYSA-K iron(3+);triacetate Chemical compound [Fe+3].CC([O-])=O.CC([O-])=O.CC([O-])=O PVFSDGKDKFSOTB-UHFFFAOYSA-K 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28023—Fibres or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3007—Moulding, shaping or extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention discloses a preparation system and a preparation method of a base biochar composite material with nitrogen and phosphorus retention and heavy metal fixation, belonging to the technical field of new material preparation, and comprising a centrifuge, a dryer, a stirrer and a carbonization furnace, and further comprising a surface strong bonding force enhancing device; the surface strong-bonding-force enhancing device comprises a supporting frame, wherein a first winding assembly, a second winding assembly and a clamping assembly are mounted on the supporting frame; the first winding assembly comprises a first servo motor, an output shaft of the first servo motor is fixedly connected with a first rotating shaft, and the first winding assembly has the beneficial effects that: the carbon fibers are wound on the surface of the biochar composite material, and the carbon fibers in the width direction and the length direction are distributed in a staggered mode, so that the carbon fibers are not prone to falling off, the adsorption force on the surface of the biochar composite material can be maintained for a long time, the prepared biochar material has good adsorption force, the surface of the biochar material is provided with a plurality of small holes, and more heavy metals can be adsorbed.
Description
Technical Field
The invention relates to the technical field of new material preparation, in particular to a preparation system and a preparation method of a base biochar composite material for nitrogen and phosphorus retention and heavy metal fixation.
Background
With the acceleration of the rhythm of social production and life, a large amount of waste biomass can be generated in industrial and agricultural production and life, and if the waste biomass is not fully utilized, the waste biomass can go bad, so that a large amount of resources are wasted, and serious environmental pollution is caused. At present, a hydrothermal method, a microwave pyrolysis method or a high-temperature pyrolysis method is an effective method for utilizing waste biomass to prepare a biochar material; the biochar has the characteristics of high specific surface area, rich active functional group content and the like, can effectively remove heavy metals, dyes, pesticides and other refractory organic pollutants in sewage in physical adsorption, chemical adsorption and other modes, and is a low-cost adsorbent. However, the biochar prepared by the method has poorer specific surface area and adsorption performance than commercial activated carbon, and how to improve the service performance of the biochar is a main problem in the practical application of the biochar; the micro battery method, the photocatalysis method, the metal oxide catalysis method and the like are common methods for degrading organic pollutants at present. The microcell method is an electrochemical technology for treating wastewater by using countless tiny galvanic cells formed by corroding iron-carbon fillers in an electrolyte solution, is also called as an internal electrolysis method, and is a method for spontaneously performing electrochemical reaction when different attribute components meet and a conductive medium exists by using the characteristics that some components in the wastewater are easily oxidized and some components are easily reduced. The micro-battery method is a waste water treatment method integrating various physical and chemical actions such as electrolysis, coagulation, electric flocculation, adsorption and the like.
According to the existing system and method for preparing the biological carbon composite material, the prepared biological carbon composite material has weak surface adsorption force and poor adsorption effect on heavy metals.
Disclosure of Invention
The invention provides a preparation method of a base biochar composite material with nitrogen and phosphorus retention and heavy metal fixation.
Therefore, the invention aims to provide a system and a method for preparing a base biochar composite material with nitrogen and phosphorus retention and heavy metal fixation, wherein a surface strong binding force enhancing device is arranged, and a coating is formed on the surface of the prepared biochar composite material, so that the surface adsorption force is enhanced, and the problems of weak surface adsorption force and poor heavy metal adsorption effect of the prepared biochar composite material in the conventional system and method for preparing the biochar composite material are solved.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
the system for preparing the base biochar composite material with nitrogen and phosphorus retention and heavy metal fixation comprises a centrifugal machine, a dryer, a stirrer, a carbonization furnace and a device for enhancing the strong surface bonding force;
the surface strong bonding force enhancing device comprises a support frame, wherein a first winding assembly, a second winding assembly and a clamping assembly are mounted on the support frame;
the first winding assembly comprises a first servo motor, an output shaft of the first servo motor is fixedly connected with a first rotating shaft, one end, away from the output shaft of the first servo motor, of the first rotating shaft is fixedly connected with a first rotating disc, a second servo motor is fixedly installed on the first rotating disc, an output shaft of the second servo motor is fixedly connected with a first electric telescopic rod, and one end, away from the output shaft of the second servo motor, of the first electric telescopic rod is fixedly connected with a first winding wheel;
the second winding assembly comprises a second winding wheel, one end of the second winding wheel is fixedly connected with a second electric telescopic rod, the second electric telescopic rod is far away from an output shaft of a third servo motor fixedly connected with one end of the second winding wheel, the third servo motor is fixedly installed on a second rotary table, one end of the second rotary table is fixedly connected with a second rotary shaft, and the second rotary shaft is far away from an output shaft of a fourth servo motor fixedly connected with one end.
As a preferable scheme of the system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the system comprises: the outer wall of the first rotating shaft is connected with the supporting frame in a rotating mode through a bearing, the outer wall of the first electric telescopic rod is connected with the first rotary table in a rotating mode through a bearing, and the first servo motor is fixedly installed on the supporting frame.
As a preferable scheme of the preparation system of the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the preparation system comprises the following steps: the outer wall of the second electric telescopic rod is rotatably connected with the second rotary table through a bearing, and the fourth servo motor is fixedly installed on the supporting frame.
As a preferable scheme of the system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the system comprises: the centre gripping subassembly includes third electric telescopic handle, third electric telescopic handle one end fixed connection U-shaped board, the connection fourth electric telescopic handle can be dismantled to U-shaped inboard wall, fourth electric telescopic handle one end fixed connection splint.
As a preferable scheme of the system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the system comprises: the inner wall of the U-shaped plate is fixedly connected with a first fixed seat, the inner wall of the first fixed seat is inserted into the fourth electric telescopic rod, and the first fixed seat and the fourth electric telescopic rod are fixed through bolts; and one end of the third electric telescopic rod, which is far away from the U-shaped plate, is inserted into a second fixing seat, and the second fixing seat and the third electric telescopic rod are fixed through bolts.
As a preferable scheme of the system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the system comprises: one end of the second fixing seat is fixedly connected with the supporting frame, and the clamping assemblies are provided with two groups.
The preparation method of the base biochar composite material for nitrogen and phosphorus retention and heavy metal fixation specifically comprises the following steps:
s1, pretreating organic waste biomass in an activating agent solution, centrifuging by using a centrifuge, and drying by using a dryer;
s2, mixing the dried biomass powder with the reductive metal powder, uniformly mixing by using a stirrer, and carbonizing by using a carbonization furnace under the condition of isolating oxygen to prepare the porous biochar material, wherein the carbonization temperature is 250-340 ℃, and the carbonization time is 8-12h; the reducing metal comprises Na and any one or more of Mg, zn and Fe, and the reducing metal powder accounts for 3-5% of the biomass powder by mass;
s3, adding the charcoal powder obtained in the step 2 into a sol system of a titanium compound for soaking, wherein the titanium compound in the sol system comprises one or more of tetrabutyl titanate, tetraethyl titanate, diisopropyl dititanate and tetrapropyl titanate, and is subjected to high-temperature anaerobic calcination, then adding a metal oxide loaded in a metal salt solution, and repeating the steps of soaking, high-temperature anaerobic calcination and adding the metal oxide loaded in the metal salt solution in the sol system of the titanium compound for at least three times respectively, wherein the step of loading the metal oxide comprises the following steps: adding charcoal powder into a metal salt solution for soaking and calcining and/or adding the charcoal powder into the metal salt solution for hydrothermal reaction, thereby obtaining a charcoal composite material;
s4, manufacturing the biochar composite material into a plate-shaped structure, and cutting grooves with a distance of 0.1-0.18mm on the biochar composite material with the plate-shaped structure to form the biochar composite material; winding the carbon fiber on a first winding wheel and a second winding wheel; starting a first servo motor and a second servo motor, wherein the second servo motor drives a first reel to rotate so as to release carbon fibers, the first servo motor drives a first rotating shaft to rotate, the first rotating shaft drives a first rotating disc to rotate, the first rotating disc drives the first reel to rotate through a first electric telescopic rod, and therefore a circle of carbon fibers are wound on the biochar composite material with the plate-shaped structure in the reverse direction of the length; starting a fourth servo motor and a third servo motor, wherein the third servo motor drives a second winding wheel to rotate so as to release the carbon fibers, the fourth servo motor drives a second rotating shaft to rotate, the second rotating shaft drives a second rotating disc to rotate, the second rotating disc drives a second electric telescopic rod to rotate, and the second electric telescopic rod drives the second winding wheel to rotate so as to wind a circle of carbon fibers on the width direction of the biochar composite material with the plate-shaped structure in a reverse direction; the first electric telescopic rod extends, and then is wound for one circle in the length direction, the second electric telescopic rod extends, and then is wound for one circle in the width direction, and the first electric telescopic rod and the second electric telescopic rod are circularly wound in the length direction and the width direction;
s5, dispersing the hydroxyapatite nanobelt in absolute ethyl alcohol according to the concentration of 12-18 g/L, preferably setting the concentration to be 15g/L, and then titrating the solution on the surface of the carbon fiber of S4, wherein the titration amount of the solution is 7-11 mL/cm;
s6, mixing phenolic resin powder with absolute ethyl alcohol according to the mass percentage of 10-18%, and then adding hydroxyapatite nanobelts according to the proportion of 6-10 g/L to form a mixed solution;
and S7, soaking the biochar composite material wound with the carbon fibers in the mixed solution of the S5.
S8, dripping the mixed solution of the S6 on the surface of the carbon fiber of the biochar composite material treated in the S7;
and S7, placing the biochar composite material treated in the step S8 in a vulcanizing machine, and treating for 30-40 minutes under the conditions that the temperature is 165-175 ℃ and the pressure is 9-10 MPa, so that a biological coating is formed on the surface of the biochar composite material.
As a preferred scheme of the preparation method of the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the method comprises the following steps: the metal salt solution comprises any three or more of a magnesium chloride solution, a zinc chloride solution, an aluminum chloride solution, a ferric sulfate solution, a ferric nitrate solution, an ferric acetate solution, a ferrous chloride solution, a ferrous sulfate solution, a ferrous nitrate solution and a ferrous acetate solution.
As a preferable scheme of the preparation method of the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the preparation method comprises the following steps: the activating agent comprises any two or more of potassium hydroxide, sodium hydroxide, zinc chloride, ammonium sulfate, ammonium chloride, ferrous sulfate, ammonium hydroxide, sodium carbonate, phosphoric acid and nitric acid.
As a preferable scheme of the preparation method of the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material, the preparation method comprises the following steps: the time for soaking in the mixed solution of S7 is 8-12 hours.
Compared with the prior art:
1. the device for enhancing the surface strong bonding force is arranged, the carbon fibers are wound on the surface of the biochar composite material, and the carbon fibers in the width direction and the length direction are distributed in a staggered manner, so that the carbon fibers are not easy to fall off, and the adsorption force on the surface of the biochar composite material can be maintained for a long time;
2. the biochar composite material provided by the invention is simple in preparation method, low in energy consumption and convenient for batch production, and the prepared biochar material has good adsorption capacity and a large number of small holes in the surface, so that more heavy metals can be adsorbed.
Drawings
FIG. 1 is a schematic structural view of a surface-enhanced bonding force enhancing apparatus according to the present invention;
FIG. 2 is a schematic view of a clamping assembly provided in the present invention;
fig. 3 is an SEM image of the biochar composite.
In the figure: the surface strong bonding force enhancing device 100, the support frame 101, the first winding assembly 200, the first servo motor 201, the first rotary disc 202, the first rotary shaft 203, the second servo motor 204, the first electric telescopic rod 205, the first winding wheel 206, the second winding assembly 300, the fourth servo motor 301, the second rotary disc 302, the third servo motor 303, the second electric telescopic rod 304, the second rotary shaft 305, the second winding wheel 306, the clamping assembly 400, the third electric telescopic rod 401, the U-shaped plate 402, the second fixing seat 403, the first fixing seat 404, the fourth electric telescopic rod 405 and the clamping plate 406.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a preparation system of a base biochar composite material with nitrogen and phosphorus retention and heavy metal fixation, which comprises a centrifuge, a dryer, a stirrer and a carbonization furnace, and also comprises a surface strong bonding force enhancing device 100, please refer to fig. 1-3;
the surface strong-bonding-force enhancing device 100 comprises a support frame 101, wherein a first winding assembly 200, a second winding assembly 300 and a clamping assembly 400 are arranged on the support frame 101;
the first winding assembly 200 comprises a first servo motor 201, an output shaft of the first servo motor 201 is fixedly connected with a first rotating shaft 203, one end, far away from the output shaft of the first servo motor 201, of the first rotating shaft 203 is fixedly connected with a first rotating disc 202, a second servo motor 204 is fixedly installed on the first rotating disc 202, an output shaft of the second servo motor 204 is fixedly connected with a first electric telescopic rod 205, one end, far away from the output shaft of the second servo motor 204, of the first electric telescopic rod 205 is fixedly connected with a first reel 206, the outer wall of the first rotating shaft 203 is rotatably connected with a support frame 101 through a bearing, the outer wall of the first electric telescopic rod 205 is rotatably connected with the first rotating disc 202 through a bearing, and the first servo motor 201 is fixedly installed on the support frame 101;
the second winding assembly 300 comprises a second winding wheel 306, one end of the second winding wheel 306 is fixedly connected with a second electric telescopic rod 304, one end of the second electric telescopic rod 304, far away from the second winding wheel 306, is fixedly connected with an output shaft of a third servo motor 303, the third servo motor 303 is fixedly installed on a second rotary disc 302, one end of the second rotary disc 302 is fixedly connected with a second rotary shaft 305, one end of the second rotary shaft 305, far away from the second rotary shaft 305, is fixedly connected with an output shaft of a fourth servo motor 301, the outer wall of the second electric telescopic rod 304 is connected with the second rotary disc 302 in a rotating mode through a bearing, and the fourth servo motor 301 is fixedly installed on the support frame 101.
The clamping assembly 400 comprises a third electric telescopic rod 401, one end of the third electric telescopic rod 401 is fixedly connected with a U-shaped plate 402, the inner wall of the U-shaped plate 402 is detachably connected with a fourth electric telescopic rod 405, one end of the fourth electric telescopic rod 405 is fixedly connected with a clamping plate 406, the inner wall of the U-shaped plate 402 is fixedly connected with a first fixed seat 404, the inner wall of the first fixed seat 404 is inserted with the fourth electric telescopic rod 405, and the first fixed seat 404 and the fourth electric telescopic rod 405 are fixed through bolts; the end of the third electric telescopic rod 401 far away from the U-shaped plate 402 is inserted with the second fixing seat 403, the second fixing seat 403 and the third electric telescopic rod 401 are fixed through bolts, one end of the second fixing seat 403 is fixedly connected with the supporting frame 101, and the clamping assembly 400 is provided with two sets.
The preparation method of the base biochar composite material for nitrogen and phosphorus retention and heavy metal fixation specifically comprises the following steps:
s1, pretreating an activating agent, including any two or more of potassium hydroxide, sodium hydroxide, zinc chloride, ammonium sulfate, ammonium chloride, ferrous sulfate, ammonium hydroxide, sodium carbonate, phosphoric acid and nitric acid, of organic waste biomass in an activating agent solution, then centrifuging by using a centrifugal machine, and drying by using a dryer;
s2, mixing the dried biomass powder with the reductive metal powder, uniformly mixing by using a stirrer, and carbonizing by using a carbonization furnace under the condition of isolating oxygen to prepare the porous biochar material, wherein the carbonization temperature is 250-340 ℃, preferably 295 ℃, and the carbonization time is 8-12 hours, preferably 10 hours; the reducing metal comprises Na and any one or more of Mg, zn and Fe, and the mass ratio of the reducing metal powder to the biomass powder is 3-5%, preferably 4%;
s3, adding the charcoal powder obtained in the step 2 into a sol system of a titanium compound for soaking, wherein the titanium compound in the sol system comprises one or more of tetrabutyl titanate, tetraethyl titanate, diisopropyl dititanate and tetrapropyl titanate, and is subjected to high-temperature oxygen-free calcination, then adding a metal salt solution to load metal oxide, wherein the metal salt solution comprises any three or more of magnesium chloride solution, zinc chloride solution, aluminum chloride solution, ferric sulfate solution, ferric nitrate solution, ferric acetate solution, ferrous chloride solution, ferrous sulfate solution, ferrous nitrate solution and ferrous acetate solution, adding the charcoal powder into the sol system of the titanium compound for soaking, performing high-temperature oxygen-free calcination and adding the metal oxide loaded in the metal salt solution are repeated at least three times, and the step of loading the metal oxide comprises the following steps: adding charcoal powder into a metal salt solution for soaking and calcining and/or adding the charcoal powder into the metal salt solution for hydrothermal reaction, thereby obtaining a charcoal composite material;
s4, manufacturing the biochar composite material into a plate-shaped structure, cutting grooves with a distance of 0.1-0.18mm on the biochar composite material with the plate-shaped structure, preferably setting the grooves as 0.14mm, and cutting the biochar composite material; winding the carbon fibers on the first reel 206 and the second reel 306; starting a first servo motor 201 and a second servo motor 204, wherein the second servo motor 204 drives a first winding wheel 206 to rotate, so that carbon fibers are released, the first servo motor 201 drives a first rotating shaft 203 to rotate, the first rotating shaft 203 drives a first rotating disc 202 to rotate, the first rotating disc 202 drives the first winding wheel 206 to rotate through a first electric telescopic rod 205, and therefore a circle of carbon fibers are wound on the biological carbon composite material with a plate-shaped structure in the reverse length direction; starting a fourth servo motor 301 and a third servo motor 303, wherein the third servo motor 303 drives a second winding wheel 306 to rotate, so that carbon fibers are released, the fourth servo motor 301 drives a second rotating shaft 305 to rotate, the second rotating shaft 305 drives a second rotating disc 302 to rotate, the second rotating disc 302 drives a second electric telescopic rod 304 to rotate, and the second electric telescopic rod 304 drives the second winding wheel 306 to rotate, so that a circle of carbon fibers are wound on the biochar composite material with the plate-shaped structure in the opposite width direction; the first electric telescopic rod 205 is extended and then wound for one circle in the length direction, the second electric telescopic rod 304 is extended and then wound for one circle in the width direction, and the winding is performed in the length direction and the width direction in a circulating manner;
s5, dispersing the hydroxyapatite nanobelts into absolute ethyl alcohol according to the concentration of 12-18 g/L, and then titrating the solution on the surface of the carbon fiber of S4, wherein the titration amount of the solution is 7-11 mL/cm, and is preferably set to be 9mL/cm;
s6, mixing the phenolic resin powder with anhydrous ethanol according to the mass percentage of 10-18%, preferably 14%, and adding hydroxyapatite nanobelts according to the proportion of 6-10 g/L (preferably 8 g/L) to form a mixed solution;
and S7, soaking the biochar composite wound with the carbon fibers in the mixed solution of the S5 for 8-12 hours, preferably setting the time to be 10 hours.
S8, dripping the mixed solution of the S6 on the surface of the carbon fiber of the biochar composite material treated in the S7;
and S7, placing the biochar composite material treated in the S8 into a vulcanizing machine, and treating for 30-40 minutes, preferably 35 minutes, under the conditions that the temperature is 165-175 ℃, preferably 170 ℃ and the pressure is 9-10 MPa (preferably 9.5 MPa), so as to form a biological coating on the surface of the biochar composite material.
While the invention has been described with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. Nitrogen phosphorus is kept somewhere and heavy metal is fixed biological charcoal combined material's of base preparation system, including centrifuge, drying-machine, mixer and retort, its characterized in that: also includes a surface strong bonding force enhancing device (100);
the surface strong-bonding-force enhancing device (100) comprises a support frame (101), wherein a first winding assembly (200), a second winding assembly (300) and a clamping assembly (400) are mounted on the support frame (101);
the first winding assembly (200) comprises a first servo motor (201), an output shaft of the first servo motor (201) is fixedly connected with a first rotating shaft (203), one end, away from the output shaft of the first servo motor (201), of the first rotating shaft (203) is fixedly connected with a first rotating disc (202), a second servo motor (204) is fixedly installed on the first rotating disc (202), an output shaft of the second servo motor (204) is fixedly connected with a first electric telescopic rod (205), and one end, away from the output shaft of the second servo motor (204), of the first electric telescopic rod (205) is fixedly connected with a first reel (206);
the second winding assembly (300) comprises a second winding wheel (306), one end of the second winding wheel (306) is fixedly connected with a second electric telescopic rod (304), one end, far away from the second winding wheel (306), of the second electric telescopic rod (304) is fixedly connected with an output shaft of a third servo motor (303), the third servo motor (303) is fixedly installed on a second rotary disc (302), one end of the second rotary disc (302) is fixedly connected with a second rotary shaft (305), and the second rotary shaft (305) is far away from an output shaft of a fourth servo motor (301) fixedly connected with one end.
2. The system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material as claimed in claim 1, wherein the outer wall of the first rotating shaft (203) is rotatably connected with the supporting frame (101) through a bearing, the outer wall of the first electric telescopic rod (205) is rotatably connected with the first rotating disc (202) through a bearing, and the first servo motor (201) is fixedly mounted on the supporting frame (101).
3. The system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material as claimed in claim 1, wherein the outer wall of the second electric telescopic rod (304) is rotatably connected with the second turntable (302) through a bearing, and the fourth servo motor (301) is fixedly installed on the supporting frame (101).
4. The system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material according to any one of claims 1-3, wherein the clamping assembly (400) comprises a third electric telescopic rod (401), one end of the third electric telescopic rod (401) is fixedly connected with a U-shaped plate (402), the inner wall of the U-shaped plate (402) is detachably connected with a fourth electric telescopic rod (405), and one end of the fourth electric telescopic rod (405) is fixedly connected with a clamping plate (406).
5. The system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material according to claim 4, wherein a first fixing seat (404) is fixedly connected to the inner wall of the U-shaped plate (402), the fourth electric telescopic rod (405) is inserted into the inner wall of the first fixing seat (404), and the first fixing seat (404) and the fourth electric telescopic rod (405) are fixed through bolts; one end, far away from the U-shaped plate (402), of the third electric telescopic rod (401) is connected with a second fixing seat (403) in an inserting mode, and the second fixing seat (403) and the third electric telescopic rod (401) are fixed through bolts.
6. The system for preparing the nitrogen-phosphorus retention and heavy metal fixation based biochar composite material as claimed in claim 5, wherein one end of the second fixing seat (403) is fixedly connected with the supporting frame (101), and two groups of clamping assemblies (400) are arranged.
7. The preparation method of the base biochar composite material with nitrogen and phosphorus retention and heavy metal fixation is characterized by comprising the following steps:
s1, pretreating organic waste biomass in an activator solution, centrifuging by using a centrifuge, and drying by using a dryer;
s2, mixing the dried biomass powder with the reductive metal powder, uniformly mixing by using a stirrer, and carbonizing by using a carbonization furnace under the condition of isolating oxygen to prepare the porous biochar material, wherein the carbonization temperature is 250-340 ℃, and the carbonization time is 8-12h; the reducing metal comprises Na and any one or more of Mg, zn and Fe, and the reducing metal powder accounts for 3-5% of the biomass powder by mass;
s3, adding the charcoal powder obtained in the step 2 into a sol system of a titanium compound for soaking, wherein the titanium compound in the sol system comprises one or more of tetrabutyl titanate, tetraethyl titanate, diisopropyl dititanate and tetrapropyl titanate, and is subjected to high-temperature anaerobic calcination, then adding a metal oxide loaded in a metal salt solution, and repeating the steps of soaking, high-temperature anaerobic calcination and adding the metal oxide loaded in the metal salt solution in the sol system of the titanium compound for at least three times respectively, wherein the step of loading the metal oxide comprises the following steps: adding charcoal powder into a metal salt solution for soaking and calcining and/or adding the charcoal powder into the metal salt solution for hydrothermal reaction to obtain a charcoal composite material;
s4, manufacturing the biochar composite material into a plate-shaped structure, and cutting grooves with a distance of 0.1-0.18mm on the biochar composite material with the plate-shaped structure to form the biochar composite material; winding the carbon fiber on a first winding wheel and a second winding wheel; starting a first servo motor and a second servo motor, wherein the second servo motor drives a first reel to rotate so as to release carbon fibers, the first servo motor drives a first rotating shaft to rotate, the first rotating shaft drives a first rotating disc to rotate, the first rotating disc drives the first reel to rotate through a first electric telescopic rod, and therefore a circle of carbon fibers are wound on the biochar composite material with the plate-shaped structure in the reverse direction of the length; starting a fourth servo motor and a third servo motor, wherein the third servo motor drives a second winding wheel to rotate so as to release the carbon fibers, the fourth servo motor drives a second rotating shaft to rotate, the second rotating shaft drives a second rotating disc to rotate, the second rotating disc drives a second electric telescopic rod to rotate, and the second electric telescopic rod drives the second winding wheel to rotate so as to wind a circle of carbon fibers on the width direction of the biochar composite material with the plate-shaped structure in a reverse direction; the first electric telescopic rod extends, and then is wound for one circle in the length direction, the second electric telescopic rod extends, and then is wound for one circle in the width direction, and the first electric telescopic rod and the second electric telescopic rod are circularly wound in the length direction and the width direction;
s5, dispersing the hydroxyapatite nanobelts in absolute ethyl alcohol according to the concentration of 12-18 g/L, and then titrating the solution on the surface of the carbon fiber of S4, wherein the titration amount of the solution is 7-11 mL/cm;
s6, mixing phenolic resin powder with absolute ethyl alcohol according to the mass percent of 10-18%, and adding hydroxyapatite nanobelts according to the proportion of 6-10 g/L to form a mixed solution;
s7, soaking the biochar composite material wound with the carbon fibers in the mixed solution of the S5;
s8, dripping the mixed solution obtained in the step S6 on the surface of the carbon fiber of the biochar composite material treated in the step S7;
and S7, placing the biochar composite material treated in the step S8 in a vulcanizing machine, and treating for 30-40 minutes under the conditions that the temperature is 165-175 ℃ and the pressure is 9-10 MPa, so that a biological coating is formed on the surface of the biochar composite material.
8. The method of preparing the nitrogen phosphorus retention and heavy metal fixation based biochar composite according to claim 7, wherein the metal salt solution includes any three or more of a magnesium chloride solution, a zinc chloride solution, an aluminum chloride solution, an iron sulfate solution, an iron nitrate solution, an iron acetate solution, a ferrous chloride solution, a ferrous sulfate solution, a ferrous nitrate solution, and a ferrous acetate solution.
9. The method of preparing the nitrogen phosphorus retention and heavy metal fixation based biochar composite of claim 7, wherein the activating agent comprises any two or more of potassium hydroxide, sodium hydroxide, zinc chloride, ammonium sulfate, ammonium chloride, ferrous sulfate, ammonium hydroxide, sodium carbonate, phosphoric acid, and nitric acid.
10. The method for preparing the nitrogen phosphorus retention and heavy metal fixation based biochar composite according to claim 7, wherein the soaking time in the mixed solution of S7 is 8-12 hours.
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| CN108579676A (en) * | 2018-05-04 | 2018-09-28 | 江南大学 | A kind of repeatable preparation method using type biology carbon composite |
| CN111265713A (en) * | 2020-03-22 | 2020-06-12 | 西北工业大学 | Preparation method of strong-binding-force biological coating on surface of carbon/carbon composite material |
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| CN108579676A (en) * | 2018-05-04 | 2018-09-28 | 江南大学 | A kind of repeatable preparation method using type biology carbon composite |
| CN111265713A (en) * | 2020-03-22 | 2020-06-12 | 西北工业大学 | Preparation method of strong-binding-force biological coating on surface of carbon/carbon composite material |
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